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Ball Corporation is now field-testing an electronic programmer for IS bottle-making machines. Using a COS/MOS memory programmed on a decimal keyboard and clocked by machine-driven shaft encoders, the programmer operates electropneumatic actuators that trip the machine control valves. An operator's control station near the machine can refine the program while running, and the program can be stored on magnetic tape. An earlier version, programmed with thumbwheel switches, has been operating a machine section for several months. Both have programmed start-stop sequences. The earlier version has provided safer operation and greater accuracy. The second can also reduce programming time for repeat jobs to about 5 min per section.